end of 2015- bu why already 2016?

just read old posts I wrote end of 2014.   and last one was loosing my Muffy.  oct of 2014.  that was 4th kitty in 10 months to loose.  all over 18 1/2.     but there it is 2016, and not looking good for some younger kitties now.   cody is only 7,   I found lump Christmas day.     worried it was more than abscess bad tooth and it is.  just want do not know.  do I put him thru doing a bi-op      and it is bad,   as I will not put him thru chemo,   remove jaw bone,   radiation just to keep him here.  his quality of life,  happy kitty is first.        and not knowing  what out come is,  where do u draw the line here.    to me it is what is  best for kitty.       not just to keep him or do all u can...some times that is more for person than good for pet.   I also have two who now have arthritis ,  only 10 1/2.    not sure why this is happening to them..one lil precious  the baby of 5 siblings,  and I delivered her  mommy was to young first liter and had 7 babies  all day long,    from 8 a.m.  and this is 7 pm and precious is stuck?      I got her out.    even #6 was rough for mommy    that was scotty      I pulled him out also. he was side ways.  little did I know  another kitty was in there yet to come not for another hour.          she shows signs yr ago.       another bro is now showing signs of limping.   there are few meds none good  for kitties.  more arthritis meds for dogs.     all I can do is low dose  prednisone.    on and off   even then in time can effect kidneys.         heart aching for my babies.    make right decision.         what is best.   to find out very serious.  or let it go.     need down time praying,      to know what to do.              and more decisions on  what I am to do in next year.   stay or move.   down size or stay.   do not know that either.