White kitten found in my garden in Balbriggan

A small, white kitten with a red collar around its neck has been found in my garden. Unfortunately I cannot keep him - some of the family members are allregic. There are hundreds of cats in the area and they usually cross our garden number of times, but this little guy seems to be afraid of jumping through the fence. It's really misearable, but I can't let him inside the house.