Yogurt will not kill worms. SafeGuard equine paste or Liquid Goat Wormer are excellent for worming. They get most worms where Wazine only gets roundworm. Dose is 1/2 ml or pea-size amount of either, and repeat in 10 days. Throw out eggs for total of 24 days. Valbazen is also excellent.She does not have any signs or symptoms of any respiratory infection. She is a little thin. I will de-worm in the morning. Thank you for the suggestions.