
My working cocker was on the Venison, but she had similar problems with loose motions - we switched her to the lamb and she is fine now. Like your dogs she is very lean and when we took her on holiday recently and did a lot of walking, she looked almost skeletal by the end of the week. I give her some of the Burns Ocean Bites (smelly but she loves them and they are pure fish so no nasty ingredients) during the day and, until she recovers the holiday weight loss, am adding some coconut oil to her food. I know that Molly was very subdued on holiday and, like you, we wondered if it was because of the weight loss. Let us know what the vet said.
Rosie