Picky Eater Suggestions Needed

Does anyone have a food recommendation for a super picky eater? Barkley is suddenly picking at everything I give him. I've tried four kinds of kibble, two kinds of canned, a mixture of both, even my home-cooked food. His bloodwork is fine, teeth have been cleaned, and the vet says there are no medical problems. I'm at my wit's end. I'm thinking about trying something freeze-dried, but I can't do anything with raw because of my immune issues.

Anyone have a suggestion? Please??

 

Yes, they all eat together. They all have their "spot" on the floor which has never been a problem since they all inhale their food in about a minute. I've started gating his off since the other piranhas will go hover around him now that he eats more slowly. He's always been a good eater, although more picky than the rest of my crew, but not like this.

We didn't xray his teeth, Sharon. But the interesting thing is that he eats better at dinner than he does at breakfast. Nothing is different, I have no idea why that is. I haven't tried cottage cheese or bone broth, I'll give those a shot. I also ordered some complete freeze-dried food from Chewy so I'll give that a try.

Barkley and Checkers are littermates. He had Lyme disease at six months old which recurred thoughout his life. He is much more frail and feeble than Checkers who, in spite of two cancers, is more like a 6-year-old than a 12-year-old.

 

Good to know about Costco, Sandy, thanks. His breath is fine. I had his teeth cleaned last year after one of his slow eating spells in case that was the problem but there was nothing found. He was just at the vet for his 6-month checkup and gallbladder ultrasound plus bloodwork and got a clean bill of health, although he is on gallbladder meds for sludge.