This is our first year having chickens. We bought 6 chicks from Tractor Supply in February and they all did great. They're out in their coop now, laying well, healthy. No problems whatsoever. I like our chickens so much I decided to get some more chicks this fall. Of course TSC doesn't have any this time of year and minimum orders from hatcheries that I've seen are 25 chicks, so I bought a dozen chicks from a local backyard breeder. He threw in 2 extra so I had 14. All was well for the first few days, and then on the fourth day one looked constipated. I treated it as best I could with advice from threads on this site, but it died. I bought some a vitamin/electrolyte/probiotic supplement and added it to their water. It is "Rooster Booster" brand; they were out of Save-a-Chick. The following day another chick looked weak but no signs of constipation. I separated it with it's own food, water, and heat lamp, but it died as well. We lost another 2 the following day (yesterday), and this morning another one looks weak. That's a total of 4 dead, and 1 sick. I have no idea what is wrong with them. The first one was definitely constipated, but the others don't appear to be. I am wondering if I could have caused this by giving them a few raspberries the other day (which I later read I shouldn't have given them anything other than chick starter)? Their feed is medicated. I did everything the same as I did with the first 6 chicks we had in February. Any ideas? Advice on keeping the rest of the chicks alive? Thanks.