This is permissible. However, the sunnah is to slaughter only one sheep and include in it all your deceased ones.As for the prophet Muhammad salla ALlahu alahi wa sallam, you shouldn’t do that as  he is not in need for that and it is an innovation.

slaughrering a goat or paticipating a share on behalf of my deseased parents and prophet s w.pbuh is good at the occasion of eidul hada?

Innovations | September 13, 2015 3:43 am
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Sheikh i got your reply …my question is again regarding to duaa al ibadah…how to ask Allah for blessings by doing good deeds?
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my question is can we read subhanallahi wa bi hamdi after every salah 20times so that we can read it in a total 100 times in a day as prophet muhammad (peace be upon him)says if any1 reads it 100 times in a day he sins will be washed i want to ask if i can read 20times bcoz we hav 5 fard salah and so it wud make it a total of 100 times so in this case i m not doing a bidah pls confirm.