Struvite Crystals in my fur-babyies urine! I’m a frantic Mommie!!!

I have a 6-1/2 yr old Lab/Huskie mix & not neutered. Our Vet diagnosed him on 2-4-19 with Struvite Crystals in his urine, gave antibiotics, she tried to change his diet, & that he needed more moisture (he didn’t like the prescription hard food, I have mixed it with his Pedigree hard food)I started feeding him 1/2 can of soft Pedigree in AM & the other half in the PM and he eats his hard usually in the PM when Daddy gets home I started giving him filtered water.(he is funny about eating, (Daddy must stay in the kitchen w/him while he eats, but everything else, hes right under me whatever & where ever I go) On 2-19-19 he still had the issue, just not as bad, she gave him more antibiotics & said if in a month he is still bleeding, we need to possibly have him neutered. I am afraid of doing this to him at this age for him being depressed. I don’t know what his personalty will change to, no one does for sure. He stays inside w/me all the time unless we go outside & then I have him on a leash. He is never allowed to roam freely unattended as we live in the woods & I’m afraid of him being shot!! Besides, we are responsible “parents”! All the research I’ve done hasn’t said anything about this. Do you think this is correct advice? Thank you for your opinion & God Bless!! Sheila & “Shadow”