I am wondering whether Sally might have a urinary tract infection. She is 18 months old now and it's a long time since she had an accident in the house. She weed in the kitchen overnight and had a further accident a few days ago. The one in the kitchen last night was only small so don't think she was desperate but just couldn't hold on. So how do I get a sample from her? I wouldn't really like the vet to do anything invasive if I could simply catch it with a sterile pot but I have the feeling she'll just move away.