yellow juniper

Hi guys, im a beginner and have been lurking around here for one year already, now i decided to make a thread to try and get some help. I have recently bought a juniper that i don't know wich variety it is and i would like some help from more experienced eyes. I also have 2 other junipers...

Over the last couple of weeks my beautiful tree has been turning yellow and browning at the tips. I've been in constant care for this tree since I got it and now I'm not sure what is happening. Is anyone familiar with this coloring and cause?

I wanted to see if there was anything else that can be done specifically for my "not-so-blue" shore juniper. I bought it this way fall of last year, and while the new growth on the tips are looking like a better color, the rest of the needles are yellow. Any diagnosis? I used some Osmocote a...