Lets see a couple of tricks that helped me in the beginning were....Firmly backing the ear with something, personally I use the my rice sock. Have you tried a rice sock for warming rather than just rubbing? Musette wouldn't sit still enough for rubbing, but loved having a nice warm sock on her ear.
Trying both ears, Musette I can use either ear, but with Maxwell only his right ear bleeds, his left one might as well be a turnip :lol:
Also with Maxwell I found poking low on the ear right above that little double flap of skin worked the best, Musette I can usually get blood from anywhere along the edge so you might need to experiment a little to find the best spot.
Are you free handing or using a lancet device? In the very beginning I found I had the best luck with using the lancet device but without the cap so I could see where I was aiming but could use the spring action to do the poking. I never have gotten the hang of free-handing but I have heard that sometimes it works better when free-handing to poke at a upward 45 degree angle.
and lastly, sometimes you can 'milk' the poked spot a little bit to get the blood to rise, just put some firm pressure below where you poked and push up slightly.
Mel, Maxwell, Musette & The Fur Gang