Wow!! My beagle Sherman had a tennis ball sized lipoma right in the center of his chest, between his two front legs. We used to call it his "uniboob"!!!!
We had it removed once because he was very young at the time. It did eventually come back, but it was YEARS later so probably wouldn't be a concern for Pepper. Sherm lived to the ripe old age of 16 before dying of old age.....
Best of luck to you and Pepper - Pennsylvania prayers coming your way!!
Kayleigh (human), 15
Daniel (human), 12
Harry (Labradane), 7
Jake (Great Dane), 4
Murphy (Border Collie/Shepherd), 2.5
Eddie (Hamster), 2
Fishies (All named after Steelers)