Dog Marking

[TsarsMum]

Hey im in need of some advise.

My samoyed has taken to marking. I believe he is marking where our female indoor cat goes.

This morning was the first time i actually courght him in the act. another time he did it on her litter tray and i think but we cant be 100% certin it was him (cat has issues her self when stressed) on a beanbag,

I have blocked off the path to the back of the house so 1 she can get peace as he harrasses her to no end. and 2 as thats where the litter tray is.

SO this morning he peeéd on the thing blocking the way.

He has also been courght trying to hump the cat which he was told no for and sent outside. I have also been keeping a much better eye as the cat gets sick of it but will not go away just screams. so i now watch him at all times and tell him to leave her and he will listern for a bit and will go back.

He is not desexed and is 1

I am prepared to desex him if this will help really im happy to do anything.

anyways HELP

thanks heaps