Today, in a small park near the Cibernarium, I have seen two seagulls devouring the remains of a pigeon.
I couldn’t restrain from a sight of satisfaction.
I like nature, I like animals, I loved the dog that was living with us and I regularly visit the almond-tree we planted on her burial place.
But I don’t stand pigeons. I did celebrate the decree of Venezia municipality establishing the decapitation of hundreds of such beasts.
And I always try to dissuade parents, and especially grandparents, to accustom children to give food to those birds. It’s an unhealthy behaviour bringing disorder, filthiness and above all, more pigeons.
MC7858attitude 
I couldn´t agree with you more, pigeons are a nuisance!
Below are some corrections:
You need to use past simple not present perfect as the action of seeing the seagulls is in the past with no connection to the present.
…I saw two seagulls…
I couldn´t resist from obeserving such a satisfying sight.
..we planted at her burial place.
But I can´t stand pigeons.Infact, I celebrated ….
with the verb dissuade you need to use the preposition from and the gerund.
..from making children accustomed to giving food..
It´s an unhealthy custom….
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