WANNA THE WORTH OF THE PET

I HAVE A NORMAL SIZED MAMMOTH WITH ALL THE FOOD MUTATIONS AND TWO WEATHER ONES. THERE SEEMS TO BE A GLITCH ON ITS EARNING PER SECOND AS IT STAYED SAME AS BASE EARNING. SO I WANNA IS THAT ARE THERE ANY COLEECTORS WHO COLLECT THIS TYPE OF PETS OR I SHOULD JUST TRADE IT NORMALLY