I took my new sphynx Keano to the vet for his first check up today. I've been noticing a lot of water intake and straining to urinate. The vet said to get a urine sample somehow so I'll do that. But the vet also said the little guy has a heart murmur. What does that even mean? She said he could live a full life, or could not. I have a guarantee with the breeder but I'm attached to him and I cried all the way home. What do I do? I'm at a loss.