Does he look underweight?

[readymade]

I've had my boy Elwood for about a month now and when I bought him the people at Petco said they thought he was about 4 months old. Weighing him today he weighs about 190 grams. Is this underweight for his age?

That bp looks good in my opinion one adult mouse should be more than enough food for him at that size i would shorten his feeding days first before i offer two in one sitting