Yesterday we called my cat inside and discovered he had an injury on his paw right above one of his toes. He was limping, but he could walk (he didn't want any pressure on the paw though). It's pretty small, but it's kind of deep and round. It was bleeding when he came in but now (one day later, my mom said to leave it) it's just white. I'm worried aabout it getting infected, what should I do?