I’ve two male Linnies. I had two together for eight years. Then one died, I’ve a youngster now to keep my surviving male company. I took plenty of time introduced them and they’ve been happily sharing a cage for a few months. They’ve suddenly started squabbling tho. And my older boy has got no tail left. There’s lots of shrieking from the younger one when out of cage. They settle in the evening ok. And can be seen preening each other. Is it just spring fever ? I do have two female zebra finches in the same room although not free flying. Could that be the issue? Should I separate them during cage time?