wrapping feet and mixing up feed!

How could I have a semi-un related chicken post? These chickens take up so much time and my thoughts. What with Hazel's foot and making sure their water is thawed out in this cold weather, and mixing up their new feed....how can I think about anything else??
Last night when I brought Hazel in to wrap her foot again I noticed on her other foot that she had a small dark brown scab. Great! I thought she will have 2 wrapped feet now...well I examined her today when I got out of work and I soaked it a little in Epsom salt before she kicked the bowl over, soaking the counter. I picked the scab off and it was like a small chunk that came out of her foot. painless! so there was this little hole left so I put some vetericyn on it (or as the chicken blogs say, "packed it full of") and wrapped it with this super soft rolled gauze I found at CVS and some vetwrap and tape to hold it in place. Good as new! I checked the other chickens feet and discovered that Fanny's foot may have something in it. All the other chickens feet looked fine, is it really that common? I called my aunt last night and she was asking what I had in my coop or run that may be cutting their feet. I'm not exactly for sure, but I had a small concrete block in there that I set their food on so I covered that with straw because it could be that? I'm really not for sure but am on the lookout for what it could be.
Also another bit of news, I had ordered the probios probiotic powder and Thomas Lab's brewers yeast and garlic for their special feed from fresh eggs daily. I didn't expect to get these in the mail until next week but when I got home, they were on the porch! So when I finally got my chicken chores/doctoring done I mixed up the feed. I can say they already love it. I have these 2 chickens that barely eat the feed, they prefer to forage and eat treats, and they immediately were munching down! Hazel really liked it too. Lisa, from the blog really bragged on how great it was for your chickens so I am super excited I have everything to make a few big batches that will last me for awhile. I highly recommend making some for your flock!