I have had my 2 Rhode Island Red roosters for a month now and a couple days ago I noticed they both have stiff toes. They can't bend at all. I am new at the chicken thing and have no idea what could cause this. They are about 10 months and neither one of them crow though I have noticed them doing their rooster duties with the hens. I have also gotten fertilized eggs from the hens. Other than the toes they are alert and heathy, they eat and drink fine and roost up high at night. Any suggestions or ideas?