I think it was wise to skip this morning. Thanks for updating your signature to show the AT meter, and updating the header. I assume that you gave Fiefel the rest of his breakfast, I would have your BF test him again now and see if he is higher. The 79 is equivalent to a 49 on a human meter, and it would be better for him to surf a little higher. It would be good to make sure he gets above 80 and doesn't drop back down after the food spike wears off. If he does drop back down or isn't rising, I would have your BF give him a tsp of the HC gravy and then retest after 20-30 minutes.
I know that the post on dealing with low PS numbers says not to feed if you are stalling, and that's correct. However, the PS # you saw this morning was equivalent to a 25 on a human meter, and you absolutely want to feed a 25. If you had not already fed, I would have suggested HC instead of his regular food. If he continues to stay below 80, you will want to give him a little HC food to bring him up a little. It's ok to surf above 80, but not below, ok?
Since you are using an AT, you will need to keep in mind that any of the numbers that are referred to here that are not specifically identified as being AT numbers will be numbers that relate to human meters....your meter reads 30 points higher, so you will need to remember to subtract 30 pts from your tests to relate to the guidelines, ok? It's important to remember that, and for others to know that you use the AT because they would think that a 55 is not a big deal...when it is a very low number for an AT meter!!