This is a really good story. I like the details of the smells and how everything had been changing in the spring. The characters flowed through the story seamlessly. I like the part where Izzy saves them in the end.
When they come upon the herd, do they whisper or do are they speaking in normal voice tones? This is just me but if one were to come up on a herd of moose who have the potential to kill you, wouldn't you squat down in the grass or hide behind some trees. These two just seem to be standing there talking until the moose hear them. Or is the moose hearing them the point of the story?
What happen to Izzy's mom? Why did she give her a gun as a gift and how long ago did she pass? Note: I am not all that great on grammatics. From what I deal with in my own writing, I did not see grammatical errors. Interestingly, I did not see any spelling errors either.
Why was Brandon angry with her? Was it just the situation he had found himself in, being uprooted from the place he knew or the tag along of Izzy?
This is a great piece. It flows well. Good Job and Keep Writing.