Yes
Your answer depends on the yarn you choose for your project.
You can use wool yarn in any of the needle arts, including weaving, crochet, needlepoint -- and knitting.
She wore a homespun dress made by her grandmother to the country fair.
There are hundreds of types of yarn, the most commonly used might be cotton and acrylic; or you could me type by use which would include knitting and crewel yarn.
This question is best asked of a Vet who can help you understand what happens when a dog chews up a toy and swallows some of it.
Your answer depends on the yarn you want to use. You cancomfortablywork more stitches with thread weight yarn than you could work bulky yarn.
For hand embroidery, you might be able to use a lace weight or other thread-weight yarn.
The number of balls of wool and the ply to use is usually given in the knitting pattern. A test swatch is a good way to ensure there are the same stitches and rows as stated in the knitting pattern. When I was knitting (many years ago) balls (skeins) of wool was given in ounces!
Fibre is a class of materials that are continuous filaments or are in discrete elongated pieces, similar to lengths of thread. Yarn is a long continuous length of interlocked fibres, suitable for use in the production of textiles, sewing, crocheting, knitting, weaving, embroidery and ropemaking.
double knitting wool is lighter in weight then aran so the gauge will be wrong . the answer is No.. BUT there are aran knitting patterns made for dk or double knitting yarns ( sirdar makes some) just buy an aran pattern designed specifically for dk yarn
Knitting a scarf for a teddy bear would be the same as knitting one for a human being. Just cast on a much smaller number. The size will depend on how big your teddy is. You may want to use a sport yarn since it will be so small.
If I was crocheting with two strands of yarn and switching between the two, I would think about laying the unused strand over the top of the row below and just crochet my next stitch as usual. That is, if I were switching yarns in a single row. If I were switching yarns on different rows, I would just bring the unused yarn up on one side, by crocheting around it at the last stitch of the row. Personally, I've not tried it, but those would be my suggestions. Bringing a yarn "along" and crocheting it in the row below is done in Tapestry Crochet (best know patternmaker: Carol Ventura). There is a different "process" with Tapestry Crochet, as you don't turn your work, and you use single crochet (sc), only.