Tortoise lost for 4 years, returns home!

[Karen]

I did get a bit confused as several articles say she is 25 pounds, and weighs 35 pounds more than when she left 4 years back.

LOL, poor writing!

For lack of a comma, the meaning is totally different:

original:
Now about 35 pounds heaver than when she left, the Wellingtons are confident this is their escape artist.

corrected:

Now about 35 pounds, heavier than when she left, the Wellingtons are confident this is their escape artist.