I have 3 peachicks that hatched June 14 & 15, 2014. Last Monday, the 14 month old female great Pyrenees had figured out how to get into their pen. She seems to want to play with them. I also have a flock of 35 various chickens & the GP doesn't bother them except for an occasional romp through them. After I got her out of the peachick pen, I discovered one of the peachicks had a closed swollen left eye, was not interested in eating scrambled egg and was lethargic. It had a great deal of moist sand stuck to it's back, which I could not figure out. I brought it inside in a pet carrier & researched. It sounded to me like the peachick had a respiratory problem & gave it an injection of .3cc of Tylan 200. It perked up after a few hours & I followed up with another injection on Wednesday. It is now a week later and the peachick is loving all this attention & wants to sit on my lap all the time .It still stretches it's neck & opens it's mouth like there is still something stuck inside. The eye swelling went down quickly but it still keeps the eye closed for most of the time. The appetite is great & it's general well being seems normal. I cannot see any blockage down it's throat. There was never an abundance of mucus in it's beak. I discovered the GP is determined to get into the peachick pen so she is being tied up all day now to protect the other two peachicks until I can get an aviary built. Tying up a LGD kindof defeats it's purpose! A couple days after this first incident, I found the GP in the pen playing with a very scared peachick who was laying on it's back in the sand. I examined it & found only wet sand matted to it's back. It quickly recovered. This is why I believe the first incident was possibly a result of the GP trying to play with the peachick. I am still concerned with the two remaining physical problems tho. Should I go ahead & treat the peachick for gapeworm? I have Safeguard on hand already.