two love doves

Almost a year ago I got a silkie pair. Today my mom went to the coop and found the rooster dead we don't know why he died all I know is two days before he died he got really depressed. When we found him his hen was guarding him to we buried my killer goriller baby and left the hen in the greenhouse because she wasn't acting right. Well my mom went to tractor supple that day and when she came home the hen was dead too and I don't know why. Does anybody have any clues