I say yes!!! better now than later.. I got Evie when Kayah was a little over two years old.. and it took Kayah FOREVER to get used to Evie..
BUT here's my big BUT! with all the hours you work.. plus going back on the pedigrees on both dogs (and all the breeds we have already).. I would get BOTH of them fixed!!
Believe me it's best for both of them. I never had Kayah fixed in the hopes of breeding her, but when I did my research (and yes, I wanted, still do, become a ligit breeder) it takes a LOT of work.. way more than I expected.. so i never did that to her.. and, although I still want to breed.. it will be in the future, when I can stay home and care to the most important thing to me: my "babies"
Evie my 10 month baby was spayed at 6 1/2 months.. and at the time, I thought I was doing the worst thing ever... she's sooo much better off.. and she's such a lovey bug now

but yet, still so fiesty!
Anywho... get a second.. but since you don't have the time (and I'm sure you don't want Orion (cute name btw) lifting all over the house) get them BOTH fixed
