My daughter's calico kitten is 3 months old and she has a cold. What can I give her to help treat it......I have duramycin Aureomycin tylan 50 and vetrx what would be the best out of these for a 3 month old kitten that weighs about 5lbs? Thank you and yes I know she should head to the vet but if I can treat at home I plan on it. Please no criticizing just looking for an answer.