Gizmodo
Member Since 2026
Hi all
2nd time poster (now that I have finally had the time to read and absorb how to use the spreadsheet and some of the other threads, however it had been an extremely stressful and busy time so I apologise I have likely missed things).
I believe my spreadsheet for Gizmo's readings should be linked in my signature, and there's some more background info in my profile perhaps?
For additional context to try to explain my spreadsheet...
My vet has prescribed 3u BD, this has not been reviewed since I believe the 14th June? Maybe earlier than that. I sent a curve based off 3 units on the 29th June where his AMPS was 446 and his "nadir" was 292 at +12hours when I was due to give his PM dose. I gave the dose as prescribed and monitored through the night, and his nadir was 194 at roughly +4h before rising back up to 428 by AMPS. My vet didn't reply to this. However this was around the time that it was really hot and I was giving more wet food and less dry food. I started to notice the difference in his readings and continued to titrate the food over a few weeks and also switch to lower carbohydrate wet food as well. I reduced his insulin dose to 2u during this process because I wasn't able to monitor his nadirs very well and my vet has always drilled into me the risk of a hypo compared to the risk of hyperglycaemia and has been fine with Gizmo having readings above 400 consistently. These readings were all done on an Alphatrack3. However I switched to a human meter for cheaper strips so I could afford to test more during this period of food titration.
I started to run into further problems with his insulin dose after a few weeks of titrating the food and getting the point where he was on just wet food. He'd never had any symptoms of a hypo when I'd been home and his pre-shot levels were generally the same. However he started to have much lower readings at his pre-shot doses which a Reddit User directed my to the SLGS dosing protocol which talks about what to do if levels are lower. Although they were above 200, it was still in the 200-250 range which I just wasn't used to Gizmo being in and I was worrying about giving the full 2u at those points, so I followed the advice to give a lower than usual dose and typically the next couple of cycles the pre-shot level would be okay. However it started to happen more often and with pre-shot readings in the 100-200 range, so I dropped him from 2u to 1.75u on the 15th July.
However after a few doses of 1.75u, he had a mild (asymptomatic) borderline hypo around 68 so I reduced him further to 1.5u until I could do a full curve. This was on 18th July and he went down to 47 at +9h, so various people on Reddit told me the dose was too high whereas other people told me the dose was too low and 47 was fine. Bearing in mind my vet had told me not to go below 216 on a pet specific meter, I was nervous about the conflicting advice. I reduced the dose to 1u and messaged my vet to show them the curve on 1.5u. The vet didn't reply to that, so I chased them 2 days later with another curve on 1u where his nadir was 135 on a human (not terrible, but much below their recommendation) and he also had raised ketones of 23.4mg/dl.
The vet advised me that they couldn't advise on his insulin dose as his readings were from a human meter which was more than 90mg/dl different than a pet meter. So whilst he is technically prescribed 3u BD still, I am in no-mans-land trying to work out if the dose I am giving him is too high and causing bouncing and risking hypos, or too low and risking DKA. His ketones have thankfully reduced back to 3.6mg/dl.
I had a spare libre left from the last time they tried to fit one (during his initial transition on to insulin) so I decided to try that again instead of buying more alphatrack strips. It took 3 attempts and I had to buy an additional 2 libres so it ended up being very expensive, but we got the libre on and it has been on since wednesday evening. The libre data is showing some very interesting trends with his blood glucose, it's almost like he has a regular 24-48h cycle where his insulin dips low for the first shot, then jumps up again, then holds much steadier for the next cycle, then dips and peaks again, then holds. Is this because of bouncing?
I had more confidence to increase his dose back up to 1.5u now that he has a libre to alarm if he's hypoing, and he hasn't had any hypos since then, but there have been two cycles where his sugars don't start to increase back up to a good pre-shot level until around 14 hours.
I have still been taking pre-shot levels on my handheld meter as I know the libres aren't 100% accurate and are better for just representing the trend, but I wasn't sure what data to input onto the spreadsheet because I'm also trying to give the poor boy's ears a break from all of the pricking. However I have also been trying to do some random checks to try to prove to my vets that my human meter can represent the trend just as well as the Alphatrack, especially if they're happy to use libre readings. I've entered the readings from the handheld on a separate line to the libre readings on the spreadsheet, so you can discount either as needed. I'm also going to attempt to attach the libre graphs so you can see the trend I'm trying to explain.
TLDR;
1) Do you think the dose I'm giving is too low, too high, or okay to continue with?
2a) What should I do about late nadirs/low pre-shot readings? People give me lots of different advice - they say don't change the dose around too much and give sliding-scale insulin, however some people tell me to shoot when it's ~150-200 and some people say not to shoot under 200, some people say hold the dose for 7 days before adjusting, others say you can adjust after 5-6 cycles. I'm trying to ensure that he still gets some insulin, but on the days that I'm not going to be home because I have work, I don't know how much to give.
2b) his blood glucose usually spikes when I give him food, even though it's low carb content. the insulin onset is usually around +1.5-2.5h, so even if his reading is only ~150-180, would it be okay to give him food and insulin knowing the food will likely kick in much quicker than the insulin? he then gets more food from the autofeeder at +3h ish, but that's less guaranteed because the wet autofeeders are new and I'm not confident that he would definitely eat his food vs his sister might eat it vs he might eat both portions.
3) how should I track libre data on the spreadsheet, or should I not include this at all? Okay I actually found the useful thread on this now, I hadn’t found it before as it was titled continuous glucose monitors
2nd time poster (now that I have finally had the time to read and absorb how to use the spreadsheet and some of the other threads, however it had been an extremely stressful and busy time so I apologise I have likely missed things).
I believe my spreadsheet for Gizmo's readings should be linked in my signature, and there's some more background info in my profile perhaps?
For additional context to try to explain my spreadsheet...
My vet has prescribed 3u BD, this has not been reviewed since I believe the 14th June? Maybe earlier than that. I sent a curve based off 3 units on the 29th June where his AMPS was 446 and his "nadir" was 292 at +12hours when I was due to give his PM dose. I gave the dose as prescribed and monitored through the night, and his nadir was 194 at roughly +4h before rising back up to 428 by AMPS. My vet didn't reply to this. However this was around the time that it was really hot and I was giving more wet food and less dry food. I started to notice the difference in his readings and continued to titrate the food over a few weeks and also switch to lower carbohydrate wet food as well. I reduced his insulin dose to 2u during this process because I wasn't able to monitor his nadirs very well and my vet has always drilled into me the risk of a hypo compared to the risk of hyperglycaemia and has been fine with Gizmo having readings above 400 consistently. These readings were all done on an Alphatrack3. However I switched to a human meter for cheaper strips so I could afford to test more during this period of food titration.
I started to run into further problems with his insulin dose after a few weeks of titrating the food and getting the point where he was on just wet food. He'd never had any symptoms of a hypo when I'd been home and his pre-shot levels were generally the same. However he started to have much lower readings at his pre-shot doses which a Reddit User directed my to the SLGS dosing protocol which talks about what to do if levels are lower. Although they were above 200, it was still in the 200-250 range which I just wasn't used to Gizmo being in and I was worrying about giving the full 2u at those points, so I followed the advice to give a lower than usual dose and typically the next couple of cycles the pre-shot level would be okay. However it started to happen more often and with pre-shot readings in the 100-200 range, so I dropped him from 2u to 1.75u on the 15th July.
However after a few doses of 1.75u, he had a mild (asymptomatic) borderline hypo around 68 so I reduced him further to 1.5u until I could do a full curve. This was on 18th July and he went down to 47 at +9h, so various people on Reddit told me the dose was too high whereas other people told me the dose was too low and 47 was fine. Bearing in mind my vet had told me not to go below 216 on a pet specific meter, I was nervous about the conflicting advice. I reduced the dose to 1u and messaged my vet to show them the curve on 1.5u. The vet didn't reply to that, so I chased them 2 days later with another curve on 1u where his nadir was 135 on a human (not terrible, but much below their recommendation) and he also had raised ketones of 23.4mg/dl.
The vet advised me that they couldn't advise on his insulin dose as his readings were from a human meter which was more than 90mg/dl different than a pet meter. So whilst he is technically prescribed 3u BD still, I am in no-mans-land trying to work out if the dose I am giving him is too high and causing bouncing and risking hypos, or too low and risking DKA. His ketones have thankfully reduced back to 3.6mg/dl.
I had a spare libre left from the last time they tried to fit one (during his initial transition on to insulin) so I decided to try that again instead of buying more alphatrack strips. It took 3 attempts and I had to buy an additional 2 libres so it ended up being very expensive, but we got the libre on and it has been on since wednesday evening. The libre data is showing some very interesting trends with his blood glucose, it's almost like he has a regular 24-48h cycle where his insulin dips low for the first shot, then jumps up again, then holds much steadier for the next cycle, then dips and peaks again, then holds. Is this because of bouncing?
I had more confidence to increase his dose back up to 1.5u now that he has a libre to alarm if he's hypoing, and he hasn't had any hypos since then, but there have been two cycles where his sugars don't start to increase back up to a good pre-shot level until around 14 hours.
I have still been taking pre-shot levels on my handheld meter as I know the libres aren't 100% accurate and are better for just representing the trend, but I wasn't sure what data to input onto the spreadsheet because I'm also trying to give the poor boy's ears a break from all of the pricking. However I have also been trying to do some random checks to try to prove to my vets that my human meter can represent the trend just as well as the Alphatrack, especially if they're happy to use libre readings. I've entered the readings from the handheld on a separate line to the libre readings on the spreadsheet, so you can discount either as needed. I'm also going to attempt to attach the libre graphs so you can see the trend I'm trying to explain.
TLDR;
1) Do you think the dose I'm giving is too low, too high, or okay to continue with?
2a) What should I do about late nadirs/low pre-shot readings? People give me lots of different advice - they say don't change the dose around too much and give sliding-scale insulin, however some people tell me to shoot when it's ~150-200 and some people say not to shoot under 200, some people say hold the dose for 7 days before adjusting, others say you can adjust after 5-6 cycles. I'm trying to ensure that he still gets some insulin, but on the days that I'm not going to be home because I have work, I don't know how much to give.
2b) his blood glucose usually spikes when I give him food, even though it's low carb content. the insulin onset is usually around +1.5-2.5h, so even if his reading is only ~150-180, would it be okay to give him food and insulin knowing the food will likely kick in much quicker than the insulin? he then gets more food from the autofeeder at +3h ish, but that's less guaranteed because the wet autofeeders are new and I'm not confident that he would definitely eat his food vs his sister might eat it vs he might eat both portions.
3) how should I track libre data on the spreadsheet, or should I not include this at all? Okay I actually found the useful thread on this now, I hadn’t found it before as it was titled continuous glucose monitors
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