Me I'd worm with Cydectin which is also Qwest horse wormer 1cc per 100 lb., so a 3 month old would need about 1/5 of a cc. depending on size. Then I'd do a 5 day Di Methox treatment. Dosages are at Goatkeeping 101 website. I'd really work on the hydration, drenching electrolyte water at least...