tale of a Donkey

a farmer had a problem with his donkey that had grown old and was of no use.it had become a liability for the former. former also had a dried up well in the mid of the farm. farmer made plans to conceal it whenever time permitted. the farmer was of progressive mind and looking forward to get rid of old things. he wanted to have latest was of cultivation.
one day it happened that the Donkey accidently fell in the well.the farmer thought at least he got a chance to get rid off that useless and old donkey. but most of his annoyance that the donkey brayed all the night and formers family could not sleep all the night . the braying continued increases so much so that the farmer decided to through all the waste material and mess in to the well to bury the donkey. farmer and his family started throwing all the waste in to the well.. in the beginning the donkey did not understand that what was happening. he realizing later , he showed off all the waste dropped on him and climbed up the fallen waste. now the farmers familly was throwing the diert on the donkey and he was shoving off to climb up. after some time the well was filled up to the rim. the donkey came up as he was climbing up the dirt so much so that he easily jumped out of the well..

is it justified to get rid of someone who had been a helping hand throughout his life?
what is difference between a useless donkey, dried up well and a retired person?