Her issue is during feeding. She gets into this monster frenzy. She actually attacks Shay to get his food, blames him and turns on him if there are no more treats after I give one to each, and even if I lock her in the bathroom to eat she comes tearing out and finds Shay and attacks with teeth like she thinks he got something she didn't. If on a strict diet she gets really snarky and attacks Shay if she hears a noise, he walks by, anything. It's like she blames him for not enough food. She is nice to the cats throughout, though, which is odd. I have never seen anything like this.
IF she is given enough food to feel full at each meal, she runs out yapping and runs around looking to see if Shay left any (I pick up bowl) and we go outside to potty and when we come back in all is well. She gets along great with Shay all the rest of the time.
I went to 2/3 cup of diet food (298 kcal/cup) rather than TOTW (370 kcal/cup) so that she can eat more pieces for less calories. The veges worked for awhile but she caught on and got angry again. However, 2/3 cup of kibble and she does fine consistently even if it means only 2x a day rather than 3x a day. It's about the full belly feeling. She is not even looking for food mid-day or early in the morning before I get up (getting restless or waking me). It's about how full her belly is at whatever meals.
We will see where this goes. She usually takes a regimen for a week or two and then goes bonkrs.
If this doesn't get a handle on things, I will re-do labs in a couple months when I do our big vet annual. All was well when she came but this is a year later and her life is different than before.
Baffling, she is an angry dieter that is all I can say.