Welsummer with sneezing and nasal discharge

[proud-armywife]

i brought a welsummer home yesterday and today she is sneezing. Her nose is running and it is mucus consistency. I have deep litter in coop and run and there is definetly a chance for allergies. She has no other symptoms. She is about 14 weeks old. I feed my flock rooster booster multi wormer mixed with food. The only med on hand is Sulmet . Do I treat? Or wait it out?

 

[proud-armywife]

Wanted to include photos...

 

[proud-armywife]

After being out of coop nasal discharge is gone sneezing has almost disappeared what should I do?

 

[proud-armywife]

Purchased tylan 50 ... Should I administer?

 

[proud-armywife]

Well I administered .5cc tylan 50 she seems a little slow tonight... I hope I did the right thing... Read other posts and tried to make the best decision I could. I had to drive about 1 1/2 hours away to get the tylan! I will be so sad if she passes
Edited to add that tomorrow I plan on two doses of .25 in am and pm. Wanted to get a good dose in today...

 

[proud-armywife]

Chicken seems better this am gave her .25 tylan runny nose gone. No sneezing. I hope I didn't act to aggressively!