When you are crocheting baby or adult shoes is quite normal rejoin the yarn several times so I strongly recommend using Standing Single Crochet method, it can be replace by the traditional (slst, ch-1, sc in same st) join however Standing Single Crochet gives a neater finish. Surprisingly a lot of crocheters still do not know about it so if you are one of those stick around and continue reading ;-)
Standing single crochet instructions:
1# Start with a slip knot already on your hook
2# Insert your hook into the indicated stitch
4# …and pull up a loop
5#Yarn over again…
6# …and pull through both loops on your hook
You have completed the Standing Single Crochet, now you can continue working as usual. It is so easy, isn´t it ?