Im currently working on proving rats are better than mice overall for breeding females..
I had a mouse eating female this year lay 6 eggs. One egg was slug and other 5 candled great. Every 5 days into incubation one of her eggs would sweat, then die. Only one egg is left and will hatch.
I have since finally gotten her to move to rats only after 5 years. She will have 1 more year at breeding before i retire her as bad breeder or not. If rats allow for better eggs next season, thats enough Proof IMO that rats are superior to mice..
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