My neighbours have a very cute little white dust mop-type dog who has issues with reddish-brown tear stains, and I have noticed also has similar staining around his paws. Neither are terribly bad, but they asked me if I know of what causes that and I have no idea so I told them I would ask around. The dog eats some type of Nature’s Recipe dry food, and is indoor-outdoor (often on a line in their backyard during the day with a doghouse and big shade umbrella, where he seems very content).
Any suggestions for what causes this? I have read different things about allergies, food issues, etc and am not sure where they should start (aside from also talking to their vet). The dog doesn’t seem itchy or otherwise bothered, and seems to be healthy overall.