How to tell if the skid float shock fails??????

Rear float has been acting up lately, wondering if they just fail or somethings can be wrong and still funtion properly when stopped and compressed and rebound resonably well. The other day slow speeds it was just packing up, acting if no rebound, then i got off and looked and was almost bottomed out. A little bit later rode up to height but just doesn';t seem to be rebounding properly and compresses so far when running that track is rubbing on back of coolers at rear bumper while climbing in hero snow. But at stop compresses normally, firm what one would expect. Anyone else's acting up?

The compression and rebound are really slow and stiff, it's 118lb's now. All my weight on the back and pulling down against the track compresses suspension about halfway down then sorta feels like it hits a stop then needs a bit of assistance to rebound all the way up.