Nice looking rats Glad to hear the male is neutered, the thought did cross my mind that you may have had him neutered, but its not done often to my knowledge though I haven't researched it much.

Rats are such interesting pets, its a pity they are so short lived...if they lived 15 years or more, they would make far better pets for the elderly than the high strung 'toy' dogs they tend to keep and have no control over.
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PHLdyPayne