If it were a bad thing to look at, and feel love for, cats other than our own, then I am GUILTY. But it is a wonderful thing to care for those who are homeless and in need. If all we can do is look at their picture or read their story, it is still our way of helping them. Our compassion might somehow help them get what they deserve. (for example) We might read a story and pass it casually along to an aquaintance who might know someone looking for a new friend. Or we might just sit crying at the enormous population of homeless animals, hoping for a solution. But I ramble.

Do not feel bad. You did not make Jack sick or prevent him from getting better just because you have the heart to care about other cats.