I have a simmental cow that freshened about 3 weeks ago. The calf is doing fine - feeding off the cow several times a day. The cow has one teat that is quite a bit bigger that the other 3 - swollen. My neigbor used to raise holsteins and said it has mastitus. Can someone tell me exactly what mastitus is? How can I treat it? I just bought this particular cow (along with 2 others that have not freshened yet)and she has not gotten used to going into the barn yet so I am having a hard time getting it into a stanchion - my other cattle use the barn without a problem. She is eating and drinking plenty and appears to be quite healthy. What am I looking at for a worst case senario? Any help would be appreciated.