
Sounds fatty to me but you can have them checked to be sure - not necessarily with taking them off, my vets have been happy to just aspirate lumps on an older dog rather than put them through surgery.
Remy and Tia are very lumpy dogs - Remy's are all as you describe, like little jellyish silicone type lumps and he's got loads of them. His first one is now the size of a date and has been growing for about 4 years.
Tia has less but bigger - the biggest one has been aspirated and is fatty only but is rock hard and immovable, so even then it's not necessarily bad. In her case it's the position that's the problem (tucked in behind her 'tricep' and now it has a little soft one growing underneath pushing it out).
I've only ever had 3 lumps removed - all from the same dog, my last one. And only one of those was suspect (and turned out to be fatty too), the others again were position - one had 'fallen' down her side under the skin, cut itself off from its blood supply and started to die, and the third was just circumstantial - the fallen lump landed on top so the vets just took the other one while they were there.