Have you tried low fat prescription food for this? I know Hill’s, RC, and Pro Plan all have a gastroenteric diet option.

One other thought…are we talking empty bladder puddles, or dribbles? If the former, ask them to palpate the kidneys to check size.

(I had a puppy I couldn’t housebreak – he could hold his urine for about 45 minutes before he’d bladder-dump. He had renal dysplasia.)

At 6 months she *should* be fully trained, but she’s still a puppy. She’ll still have accidents. Why aren’t you making sure to take her outside every hour? My 7 year old goes out hourly when we’re home.

Has she had her first heat? My bitch had an inverted vulva which corrected itself after her first heat. She had a few weird issues with urination prior to that.

I think I’d start with a vet check. Medicating without diagnosis can be dangerous, and it’s possible he has an injury you can’t see.

Have you tried:
crating
melatonin for storms
sleeping in the same room until he heals

It’s also possible this particular food doesn’t agree with her. Have you tried other formulations of the original brand?

That’s interesting, and best addressed with the vet. It’s possible they simply changed protocol, or maybe they’ve mixed up your normal schedule.

The 4DX test is the heartworm test, and every vet I’ve used has required it prior to filling heartworm prescription.

If the diet change wasn’t gradual, I would assume she’s having a hard time with it. Cats aren’t as flexible as dogs when it comes to food and changes really need to be gradual.

It could be the sudden change in smell, certainly. I think I’d keep them separated for awhile, then reintroduce. If reintroductions go poorly, expect to separate until your older dog passes.

(The older dog might want to be separated from the younger while feeling ill, as well.)