Just as the title says... have any of yall ever had this happen? I have one guinea, out of 8, that just seems to not thrive! He/She gets the same feed, water, living conditions as the rest of em, yet weak legs (as is randomly falls over and gets semi stuck, not very often though) thin, and has a voice problem (as in, it sounds like it has laryngitis, poor thing!) Looks VERY healthy aside from being a tad smaller. Great feathering, good looking legs, the whole shebang.